Rheological gravity model of the crust and upper mantle of Transbaikalia |
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| Authors: | A M Petrishchevsky |
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| Institution: | (1) Institute of Complex Analysis of Regional Problems, Far East Division, Russian Academy of Sciences, Sholom Aleikhem ul. 4, Birobidzhan, 679016, Russia |
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| Abstract: | Based on rheological interpretation of formalized gravity models, earlier known deep-seated structures in the Earth’s crust and mantle of Transbaikalia have been detailed and new ones discovered. The structures are asymmetric and transverse relative to the Baikal rift zone. Their presence explains the peculiar features of the Baikal rift, including the one-way southeasterly direction of horizontal displacement of tectonic masses and northwestern migration of the Earth’s crust extension processes. The prolonged history (more than 250 Ma) of the Baikal rift zone and Transbaikalia mountainous country involved gravity or rotational detachments of rigid tectonic slabs from the craton and their sliding along intracrustal and subcrustal decollement zones into the above-dome area of the Transbaikalia asthenolith. |
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